The AJ37 was the ground attack variant of the SAAB 37 Viggen. The aircraft received precision guided ground weaponry, like RB 04 Anti-Ship missiles and RB 05 air to surface missiles, which will later be replaced by the AGM-65 Maverick for dealing with fortifications and enemy armour, the aircraft also received the ability to carry bombs and rockets, while retaining its capability to carry AIM-9 Sidewinder missiles for self defence. A total of 108 units were built with deliveries starting in mid 1971.

It was introduced in Update "Ground Breaking".The Swedish AJ37 is a relatively capable fighter for air battles but it is much more capable at dealing with ground targets. It features external cannons and 2 x RB24J missiles for self defence, the issue being that the cannons occupy the slots used to carry countermeasures. For ground battles, the aircrafts best weapon is the RB75 (AGM-65B Maverick) which is a very capable long range TV guided missile used against armoured units. For air battles, it has a decent flight performance, but being a very heavy airframe it suffers at low speeds, thus is very recommended staying at high speeds and only turn in favourable situations.